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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

    <script>


        const xhr = new XMLHttpRequest() ;

        xhr.open('get' , '../php/02json数组.php' , true) ;

        xhr.send() ;

        xhr.onreadystatechange = function() {
            if(xhr.readyState === 4 && xhr.status === 200) {
                let data = xhr.responseText ;
                console.log(data);
                data = JSON.parse(data) ;
                console.log(data);
            }
        }


        // const str = 'hello' ;
        // const str = '{"name" : "cc" , "age" : 13}' ;
        // const str = "[1,2,3]" ;
        // console.log(JSON.parse(str));

    </script>
    
</body>
</html>